%0 Electronic Article %A J. Grilo %A J.E. Franca %K sigma delta modulation %K mixed analogue-digital solution %K multirate processing techniques %K low power consumption %K small chip size %K mixed mode ASIC %K four-quadrant multipliers %X A mixed analogue-digital solution combining sigma-delta and multirate processing techniques is proposed for realising four-quadrant multipliers. This overcomes the major limitations of purely analogue circuits and still achieves the attractive benefits of low power consumption and small chip size which cannot be afforded using digital signal processing techniques together with auxiliary analogue-digital and digital-analogue convertors. %@ 0013-5194 %T Four-quadrant multiplier combining sigma-delta and multirate processing techniques %B Electronics Letters %D November 1991 %V 27 %N 23 %P 2146-2148 %I Institution of Engineering and Technology %U https://digital-library.theiet.org/;jsessionid=1k7o8osmpdqjb.x-iet-live-01content/journals/10.1049/el_19911329 %G EN